2019-2020学年度人教版必修二Unit4Wildlife protectionPeriod2Language points课件(43张)
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2. decrease vt./vi. n. 减少, 使变小或变少 The membership decreased to 150. He decreased the speed of his car. on the decrease 在减少中 decrease to 减少到 decrease by 减少了 decreasing adj. 减少中的,在递减的